Types of Sensors

This temperature transmitter is designed for installation within either a refrigerator or freezer.

The wireless transmitter is mounted outside of the refrigerator or freezer, and an RTD PT1000 temperature probe is installed inside the fixture.

• Part No.:

  • UK/EU: GENII/FRZ/101/A

  • US: GENII/FRZ/201/A

• Temperature Range: -100.0 to +200.0°C

• Accuracy: Dependent on calibration

• Full Traceability: Yes

• Unique Serialisation: Yes

• Probe Cable Length: 2.0M (6.5ft)

This temperature transmitter is designed for installation within either an LN2 (liquid nitrogen) tank or flask container.

The wireless transmitter head is mounted outside of the fixture, and a special pluggable RTD PT1000 temperature probe is installed inside of the tank or flask.

Two probe types are available depending on application:

• A - Suitable for mounting in LN2 storage tanks

• B - Suitable for mounting in LN2 storage flasks

• Part No.:

  • Tank:

    • UK/EU: GENII/FRZ/101/TNK/A

    • US: GENII/FRZ/201/TNK/A

  • Flask:

    • UK/EU: GENII/FRZ/101/FLK/A

    • US: GENII/FRZ/201/FLK/A

• Temperature Range: -200.0 to +40.0°C

• Accuracy: Dependent on calibration

• Full Traceability: Yes

• Unique Serialisation: Yes

• Probe Cable Length: 2.0M (6.5ft)

This temperature transmitter is designed for installation within either a refrigerator or freezer when extended probe cable lengths are required, for example, in coolers or walk-in freezers.

This transmitter is a single-channel (single-probe) device.

The wireless transmitter head is mounted outside of the refrigerator or freezer, and a pluggable NTC thermistor temperature probe is installed inside the fixture.

The NTC thermistor probe bead characteristic is type 10K3A.

• Part No.:

  • UK/EU: GENII/NTC/101/A

  • US: GENII/NTC/201/A

• Temperature Range: -50.0 to +40.0°C

• Accuracy: Dependent on calibration

• Full Traceability: Yes

• Unique Serialisation: Yes

• Probe Cable Length: 3.0M (10.0ft), 15.2M (50.0ft)

This temperature transmitter is designed for installation within either a refrigerator or freezer to measure temperature whilst at the same time monitoring a door status contact.

The wireless transmitter head is mounted outside of the refrigerator/freezer, and a pluggable RTD PT1000 temperature probe is installed inside of the fixture.

The door status monitor input is connected to a separate magnetic door switch.

• Part No.:

  • UK/EU: GENII/DCT/102/A

  • US: GENII/DCT/202/A

• Temperature Range: -100.0 to +200.0°C

• Accuracy: Dependent on calibration

• Full Traceability: Yes

• Unique Serialisation: Yes

• Probe Cable Length: 2.0M (6.5ft)

• Door Contact Cable Length: 2.0M (6.5ft)

The room ambient sensing transmitter is designed specifically for installing into open room environments.

This transmitter is capable of sensing both temperature and humidity levels in an ambient environment.

The wireless transmitter is surface-mounted on a wall in an appropriate location within the room.

• Part No.:

  • UK/EU: GENII/AMB/100/EA/TRH

  • US: GENII/AMB/200/EA/TRH

• Temperature Range: -40.0 to +125.0°C

• Humidity Range: 0 to 100% RH

• Accuracy: Dependent on calibration

• Full Traceability: Yes

• Unique Serialisation: Yes

This temperature transmitter is designed for installation within either refrigerators or freezers or in ambient warehousing applications.

The mapping wireless transmitter is mounted inside the refrigerator/freezer (above -20.0°C) or warehouse area.

If installed within a freezer, then the battery operating life of the transmitter will be reduced from 5 years to 18 months.

An RTD PT1000 temperature probe is contained inside the transmitter.

• Part No.:

  • UK/EU: GENII/MAP/101/A

  • US: GENII/MAP/201/A

• Temperature Range: -100.0 to +200.0°C

• Accuracy: Dependent on calibration

• Full Traceability: Yes

• Unique Serialisation: Yes

Instrumentation transducers are used to monitor CO₂, O₂ and differential pressure.

Like other Checkit sensors, they consist of a measuring device connected to a wireless transmitter. The transducer takes the measurement, and the transmitter sends the reading to the Checkit system.

Checkit provides the following transducers & transmitters:

The transducer and transmitter are ordered separately.

The Dual Alarm / Status Contact Monitor is a wireless sensor that tells Checkit when something important changes on your equipment, for example, when a door opens, power fails, or a machine shows a fault.

It doesn’t measure temperature or power directly. Instead, it connects to your equipment’s alarm or status contacts — small on/off connection points built into many commercial fridges, freezers, incubators, and other systems.

The sensor can connect to two contacts at once, and these can come from different types of sources:

Alarm contacts – electrical signals from equipment that change when there’s a problem, for example, when a freezer’s motor trips or a fridge loses power.

Status contacts – switches that show if something is open or closed, on or off, for example, a magnetic door switch.

When one of these contacts changes — such as a door opening or a fault signal being triggered — the sensor detects it and sends a wireless update to Checkit, so the event can be logged and an alert raised if needed.

The clean contact status/alarm input connection cable length is 2.0M (6.5ft).

Typical Monitored Contacts:

• Magnetic Door

• AC Power Failure

• Refrigerator/Freezer Fault

• Incubator Fault

• Gas Alarmed

• Systems Incubator

• C02 Alarm

• Refrigeration Plant Status

• Refrigeration Plant Alarm

• BAC-T Alarm

• Refrigeration Compressor:

  • Fault

  • HP Cut out

  • LP Cut out

  • Run Status

  • Motor Trip

• Part No.:

  • UK/EU: GENII/CCM/102/A

  • US: GENII/CCM/202/A